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MCQs

Total Questions : 163 | Page 11 of 17 pages
Question 101. . An op-amp circuit in which the output voltage is equal to the difference between the two input voltages is called a(n) _____
  1.    integrator
  2.    differentiator
  3.    differential amplifier
  4.    voltage regulator
 Discuss Question
Answer: Option C. -> differential amplifier
Question 102. . The voltage required to force the differential output to zero is called _______.
  1.    input-offset current
  2.    input-offset voltage
  3.    input bias current
  4.    slew rate voltage
 Discuss Question
Answer: Option B. -> input-offset voltage
Question 103. . The common-mode rejection ratio (CMMR) is the ratio of _____ to ______.
  1.    the differential voltage gain, the common-mode voltage gain
  2.    the differential power gain, the common-mode power gain
  3.    the ideal voltage gain, the actual voltage gain
  4.    signal voltage, noise voltage
 Discuss Question
Answer: Option A. -> the differential voltage gain, the common-mode voltage gain
Question 104. . If the input to a comparator is a sine wave, the output is a(n) _________.
  1.    ramp voltage
  2.    sine wave
  3.    sawtooth wave
  4.    rectangular wave
 Discuss Question
Answer: Option D. -> rectangular wave
Question 105. .  Current cannot flow to ground through a(n) ________.
  1.    mechanical ground
  2.    ac ground
  3.    virtual ground
  4.    virtual short
 Discuss Question
Answer: Option C. -> virtual ground
Question 106. . ______ is NOT a characteristic of an ideal op-amp.
  1.    Infinite voltage gain
  2.    Minimum bandwidth
  3.    Infinite input impedance
  4.    Zero output impedance
 Discuss Question
Answer: Option B. -> Minimum bandwidth
Question 107. . "Half-splitting" is
  1.    a means for nuclear fuel cells to produce electricity
  2.    a means of isolating a problem in a circuit
  3.    a means for reducing a high ac voltage to a low dc voltage
  4.    a means of limiting current in a circuit
 Discuss Question
Answer: Option B. -> a means of isolating a problem in a circuit
Question 108. . A virtual ground is a(n) ______ ground because this point is at zero volts.
  1.    ordinary
  2.    voltage
  3.    chassis
  4.    earth
 Discuss Question
Answer: Option B. -> voltage
Question 109. . If the voltage across a fixed value of resistance is increased five times, what does the current do?
  1.    It increases by a factor of five.
  2.    It decreases by a factor of five.
  3.    It stays the same.
  4.    Not enough information
 Discuss Question
Answer: Option A. -> It increases by a factor of five.
Question 110. . The resistors Rf and Ri in an op-amp circuit control ______ .
  1.    positive feedback and current gain
  2.    negative feedback and power gain
  3.    negative feedback and voltage gain
  4.    open and closed loop gain
 Discuss Question
Answer: Option C. -> negative feedback and voltage gain

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